Draft-rigging.



No. 815,049. PATENTED MAR. 1a; 1905.

c, A. TOWER. DRAFT RIGGING'.

k APPLIOATION FILED I'IIB- 91 1905.'

No. 815,0 9. PATENTED'IMAR. 1-3, 1906,

0. A. TOWER.

DRAFT RIGGING. APPLIG'ATIQN FILE]? FEB. 9,1905.

wnugssgs 4 SHEETS-SHEET 4.

PATENTED MAR. 13, 1906., G. 'A.- TOWER. DRAFT RIGGING. APPLICATION FILED rnB. 9.1905.

1 Nu. mw

mi 3 ww V mvsmoa 5 aim wn-n essss 2 rigging which is tame P PAZ Q cLINroN A. TOWER, or ciinvnnllnn, oino, ASSIGNOR TO T E NATIONAL MALLEABLE OASTINGS RATION or OHIO.

COM ANY; or CLEVELAND, OHIO, A coerce;

bnAFv-niiei'nel Patented March 13, 1

7 Application filed mime 9,1905. BeriaLNo.-24=4,886.

To all whom, it may concerm',

Be it known that I, CLINTONVA. Towns, of Cleveland, Cuya hoga countg Ohio, have invented a new. and useful raft-Rigging, of 5 which the foll'owing'is a cl ar, and exact descriptiomre'ference being tothe accomplanying drawin s, formingpartof this speci cation, in whic I Figure 1 is a longitudinal section, partly in to elevation, of my improved friction draftrigging, the springbein omit ed. 'g.2is a orizontal section 'chthespringls illustrated. Fig. 3 1st rtical cross-section on the irregular lineII of Fig. 2. Fig.4 is a top plan view. Fig. 5 1s a perspective yiew of one ofthe frictiomelements, Eigvfi'is a vertical cross-sectionbf a modified c nstruc tion. Fig; 7 is a vertical longitudinal section thereof; Fig. 8 is a perspeciveview'ofione of the frictionelements of, Fig. 7. Fig. his a longitudinal section of a modified construction, showing .an additional spring appliedto the device. 1

v v v My invention proyi'des' a friction draftf siniple constructioniand comparatively'chea initsfirs't costand ob viates themanyd' culties due" to the necessity' for frequentglre airingwhich are incident to otherformsi'of frlc ion draft-rigging. It

0 is compact andwill ii in the place now required for ordinaryspring draf -r1ggings. It is well understood that friction draft-riggings must 'be' simple and durable, for the work which istobe put upon them in service is of a 3 5 ve severe character, and if they are easily .bro on or put out ofrepair their desirability f and usefulness are very much'lessenedf-f My invention contemplates the use of.

frictional devices which are operated by. the 40 motion of the draw-bar and are usedin 0011-. junction with spring mechanism 'which'is inclined to the line of draft, so that wedges and similar devices which complicate the 23p a-' ratus and impair its efficiency can be dispensed with. K

, .The' principle of my invention-may be applied in many ways;but I deem the forms shown in the drawings to be desirable;

' In the drawings, 2 represents the. oke,

which extends from the rear endof the rawbar shank 3 and may be of any suitable construction, for the means, of connection between the draw-bar'and theelements of my ingly-shaped socket 1 he spring-plates face each other and are friction device do not constitutea hmitmg feature of the invention ;4 is a case inwhich the parts of myapparatus arecontained'and which is preferably a strong casting of box form set between the draft-timbers 5 5-. or otherwise suitablyse cured to the framing of the ca The oppofixedjfriction elements. 'Fitting in this case 6o site inner surfaces of this case constitute are the movable friction elements, consisting, preferably, of opposite. followers 6' 7, which, as shown in the figures on the first and second sheetsof the drawings, are of general L shape, theirs'ide portions 6 7being of cir cularputline to conform'to the shape of the case 4, which is also curved on its interior, and the end portions 6 7 I tegral with the side portions, being flat and provided, preferably, with strengthening ribs or flanges 8. Atornearthe corner of each follower is a shoulder 9, preferably ofknuckle form, and adapted to receive a. correspond- 0 of a spring-plate 1-1.

adapted to hold an interposed spring 12 ,which the draw-bar and its yoke. The friction elements are' therefore substantially parallel with the line of draft and the spring is. in"- clined thereto. For the purpose of holding the followers and the spring removably in the case I employ keys .13, which are adapted to be set vertically within sockets atthe forward end ofthe case and bear against shoulders 114 being held, preferably, by bolts 15, having 00 ters 16 at their lower-ends. When the keys are ineplace, they block the end follower 6; butwhen the keys are renioved, as can be which are preferably in.-

therefore extends at an angle to the line of v done by first detaching thecotters and bolts,

' the entire ri in yoke, followe r g wise from the case.

When the parts are in the position shown in Fig. 2, if a bufling thrust is applied to the draw-bar the'end of the latter bearing against the front follower 6 forces it'inwardly, the rear follower being'held in 1place by abutting against the back end of t e case. ward motion of thefollower 6 acting upon the sprin toforce t e fol ower 6 against the side ofthe case, bringing'iit. into intimate frictional contact therewit comprising the draw-bar, and sprlng can be drawnend- The in" com resses the'latter and causes it v and the greater the extent of leased, the spring advances the front follower drawings I employ addition to t e follow- I the'follower 7 and the yoke, and the rear folmay be a single piece.

17 affords an additional cushioning device\lateral confininglsilrfaces, v

between said surfaces, and yielding mechan- 1o 5 ism arranged to force said followers into conin bufiing the spring 17 is compressed by the agonally to the line of dra exerts the required frictional resistance to the 20' back of the case between the rear fol-lower 7 motion of the follower the greater will be the compressionof the spring and the eater the force with'which the follower is he 01 frictionally against the side of the case. This frictional engagement is also increased by the movement of the spring to a position more nearly at right angles to the line of draft as the follower 6 moves inwardly. The device therefore opposes the required yielding and frictional resistance to the bufiing motion of the draw-bar. When the buffing force is re- .6 into position against the keys 13, and if a pullingforce is now exerted upon the drawar the yoke 2 acting upon the rear follower'7 draws it forwardly, thus again com ressing the spring 12, the com ression of whic forces having friction-surfaces substantially parallel to the line of draft, a spring disposed diagonally to the line of draft, said spring arranged to force the friction elements into contact, and a supplementary spring parallel with the longitudinal axis of the draft gear and through which pressure is exerted u on said spring friction structure; substantial y as described. I

3. A frictional draft-rigging, com rising elements having frictionsurfaces su stantially parallel to the line of draft, and yielding mechanism inclined to the line ofdraft and arranged to force said friction elements into contact; substantially as described.

4, A frictional draft-rigging, com rising elements having friction-surfaces su stanthe follower 7 lateral y against the case and tially parallel to the line of draft, and an in-.

forward motion of the draw-bar; In the modification shown in the figures on the third' sheet of the drawings the interior of the case is rectan ular in crossws'ection, and the followers have t erefore fiat sides as well as flat ends; but their operation isthe-same as that above described. f 5 l V i In the construction shown in-Fi -.9 of the ers 6 7 and the pr mary spring =12 an additional spring 17, which is interposed at the and the end of the yoke 2, follower-plates 18 and 19 being preferably interposed between lower 19 having a seat against shoulders 20 on the extension of the case, which is provided for the spring, or the followers 7 and 18 The use of the spring which coacts with the friction mechanism, for

follower 18, which forces it rearwardly against the follower 19. In pulling the yoke 2 acts on the follower 19 and compresses the spring 17, which in turn transmits the pressure through the follower 18 to the friction-follower 7.

Many other modifications of the invention will su gest themselves to those skilled in the art. I or example, the frictional devices and the inclined spring may be duplicated, as many of, them as desired'being set in tandem or in the form of a twin rig ing. They may also be varied in form an maybe used in combination with spring devices of other constructions, since; f V v, I

What I claim is.

1. A spring friction structure for the draftgear of railwaycars, comprising elements having friction-surfaces substantially parallel to the line of draft, and a s ring disposed dift, said spring arranged to force the friction elements into con tact substantially as described. I.

2. A spring friction structure for the draftelements into contact substantially as desaid case su clined spring arranged to force said friction s scribed.

5. spring friction structure for the draftgear of railway-cars, comprising lateral confining-surfaces, opposite followers between said surfaces, and an inclined spring arranged to force said followers into contact with said confining-surfaces substantially as described.

6. spring friction structure for the draftear of railway-cars, comprising lateral conning-surfaces, opposite followers between 5 said surfaces, an inclined spring arranged to force said followers into contact with said confining-surfaces, and a supplementary -s ring arallel with the longitudinal axis of t e dra t-gear and through which pressure is exerted upon said sprin friction structure; substantially asdescribe 7. A frictional draft-rigging, com rising opposite fo owers tact with said confining-surfaces; substantially as described.

8. A frictional draft rig ging, rising lateral confining-surfaces, o posite fo owers no between sald surfaces, an

an interposed spring arranged to forcesaid followers into contact with said confining-surfaces; substantially as described.

9. A frictional draft rigging, comprising "1 1 5 a case having friction-surfaces arranged-sub stantially parallel to the line of draft, inter posedfriction-followers and an inclined spring arran ed to force said followers against gstantially asd'escribed. v 10. A frictional draft-rigging, comprising friction-surfaces substantially parallel to the lineof draft, friction-followersbetween said surfaces, and an inclined'spring between said followers; substantially as described.

11. A frictional draft-rigging comprisin a case, op osite followers of L shape, an

spring mec anism extending between the fol lowers and bearin 5 gear of railwaycars, comprising elements I thereof;substantia ly as described.

on the corner portions 12. A frictional draft-rigging comprisin a case, friction elements therein arranged to a case, friction elements therein, an incline be removable horizontally from the end of spring, and a key by which the friction dethe case, and a key at the end of the case by vices are held removably Withinthe case; sub-" W 'ch the friction devices are held removably I 5 5 stantially as described. therein; substantially as described.

13. A frictional draft-rigging comprisin I In testimony whereof I have hereunto set friction elements, an interposed inclined my hand. spring, and spring-plates, said spring-plates CLINTON A. TOWER. having a knuckle-joint connection with the Witnesses: 1o friction elements,'substantially as described. HENRY F; POPE).

14;. A frictional drafterigging comprising; HARRY E. ORR. 

